爆炸容器内小药量实验动态标定压力传感器

在爆炸容器中进行小药量空中爆炸实验, 利用传感器序列测量冲击波速度, 根据冲击波Rankine-Hugoniot关系获得测点近似理论峰值压力, 从而实现压力传感器的标定, 获得的灵敏度相对误差较小。同时测量了相应的冲击波参数, 并利用Modified-Friedlander公式进行数据后处理, 结果表明固定超压拟合更接近物理事实, 固定正相时间拟合也具有较高精度。最后进行了误差分析, 发现不同传感器特性及数据后处理方法都会带来一定误差。实验结果表明这种测量和后处理方法具有较高的精度, 可以同时标定传感器和测量冲击波参数。

Dynamic calibration of pressure sensors by small-scale explosive experiments in an explosion containment vessel

Air blast experiments of small-scale charges were conducted in an explosion containment vessel.The shock wave velocity was measured by sensor series.And the approximately theoretic peak pressure was determined from the shock wave velocity by using the Rankine-Hugoniot relationship. The sensor was then calibrated, and the relative error of the sensitivity was small.The shock wave parameters were measured and post processed by using the modified-Friedlander equation.The results show that the nonlinear regression by fixing the overpressure is close to the physical fact, and the fitting by fixing the duration has a high precision.Error analysis reveals that the sensor properties and the post-processing methods can produce errors.Experimental results display that the shock wave parameter measuring and post-processing method suggested has a high precision.By this suggested method, the sensor calibration and parameter measurement can be conducted simultaneously.